On Wed, 18 Apr 2007, Vitezslav Kotrla wrote: > I've got SanDisk Sansa c240 MP3 player here. It usually causes repeated > USB resets and disconnects, but _sometimes_ it settles down and is > eventually found. But settling down is rare - most of the time it just > keeps resetting. > > Anyway once discovered, it is mountable and I managed to write 700 MB of > data with no problem (well, average write speed was 4 MB/s, too low for > my taste). > > Does this behavior ring a bell?
Often these errors are caused by problems in communication, i.e., bad USB cables or connections. (Sometimes the bad cables are the ones inside the computer case, going from the USB port to the motherboard.) Sometimes the errors are caused by problems in the device itself, but that tends to be relatively rare. To get more information you can try using the usbmon facility (see the instructions in the kernel source file Documentation/usb/usbmon.txt). Occasionally the problems are caused by the USB controller on the computer. Not much you can do about that except to replace the hardware. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
